Oscillating valve.



G. A. BUSH.

OSOILLATING VALVE.

APPLIOATION FILED 1320.27, 1910.

1 ,026,459. Patented May 14, 1912.

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OSCILLATING VALVE.

APPLICATION FILED 1120.27, 1910.

A 1,026,459. Patented May 14, 1912.

2 SHEETS-SHEET 2.

f Messe@ jwe/' GEORG-E A. RUSH, OF KANSAS CITY, KANSAS.

OSGILLATING VALVE.

Specification of Letters Patent.

Patented May 14, 1912.

Application filed December 27, 1910. Serial No. 599,392.

T0 all 'whom 'it may concer/n:

Be it known that I, Groane A. RUSH, a citizen of the United States, residing at Kansas City, in the county of lVyandotte and State of Kansas, have invented certain new and useful Improvements in Oscillating Valves, of which the following is a specification.

This invention relates to oscillating valves and my object is to produce a valve of this character which can be used to advantage on locomotives and stationary engines and which will perform its function efficiently and reliably.

A further object is to produce a valve of such construction that leakage of steam is prevented, such leakage on locomotives frcquently causing accidents as the vision of the engineer' is more or less obscured by the escaping steam.

A further object is to produce a valve of this character which is balanced and hence operates easily and With practically no friction, under a minimum power pressure and with a minimum supply of lubricating oil.

With these general objects in view and others as hereinafter appear, the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanyingdrawings, in which- Figure 1, is a vertical section on the line I-I of Fig. 2. Fig. 2, is a vertical section on the line II*II of Fig. 1. Fig. 3, is a section on the line III-III of Fig. 1, with the valve omitted. Fig. 4, is a detail perspective view of a circular bushing for the steam chest. Fig. 5, is a detail perspective view of the packing frame.

In the said drawings, 1 indicates a steam cylinder, 2 the steam chest cast integrally with the cylinder and provided with a cylindrical chamber 3, extending at right angles to the longitudinal center of the cylinder,

and communicating with the lower part, of

chamber 3 at opposite sides of its vertical center are steam ports 4 leading to t-he opposite ends of the steam cylinder. Between said ports is an exhaust chamber 5, vertically below the center of chamber 3, and said exhaust chamber communicates with the exhaust port 6.

The heads 7 and 8 of the cylinder are preferably bolted thereto for the convenient introduction or removal of the piston 9, whose rod 10, extends through head 8 and the packing box 11.

The port for supplying steam to the steam chest, is numbered 12, and is formed in one head o1- end of the steam chest vertically above the center of such head. 13 is a circular bushing fitting against the head or end of the steam chest provided with inlet port 12, and said bushing has a central opening 14, and an opening 15 through which bolts 1G extend into the adjacent head or end wall to secure the bushing rigidly in position, and the bushing is also provided with an opening 17 communicating with the inlet port.

The opposite end of the steam chest from port 12, is closed by a removable head 18 having a stuflng box 19, in alinement with the journal opening 14. 20 is a hollow cylindrical valve having heads 21. and 22 at opposite ends, the last-named head having an opening 23, and the other an opening 2f a for purposes which hereinafter appear. Projecting from opposite ends of the valve are alined journals 24 and 25, the former finding a bearing in bushing opening 14 and journal 25 in head` 18, and the stu'ling box 19, and secured rigidly upon journal 25 is a crank 2G, adapted to be operated by any suitable valve gear, not shown.

The valve is provided internally with a V-shaped bridge 27, dividing the interior into a supply chamber 28 and an exhaust chamber 29, the opposite ends of chamber 2S communicating alternately with the ports 4 leading to opposite ends of the cylinder. Chamber 29 alternately connects said ports with the atmosphere through chamber 5, and port G.

30 are longitudinal grooves at opposite sides of each port 4, and 31 transverse grooves connecting theends of grooves 30 at opposite ends of said ports.

32 are packing strips fitting in grooves 30, and 33 end strips which fit in grooves 31 `andpreferably connect the ends of strips 32 so as to constitute packing frames, the inner ends of strips 33 of each frame being reduced at 34 to form lap-joint connections. These frames are held pressed yieldingly upward against the valve to form a steamtight joint therewith, by springs 35, seated in holes 36, communicating with said grooves.

It will be seen by reference to Fig. 1, that steam is free to pass from chamber 28 around the valve until cut off by the outermost packing strips 32, which surrounding film of steam tends to lubricate the valve, it being also apparent that steam can pass through opening 23 and by bearing against the head 22 of the valve and the 'head 8 of the steam chest prevent friction between said parts, and hold the valve pressed against the bushing 13, which when worn maybe easily removed and replaced by a new one. It will alsobe apparent that the construction and arrangement of the valve is such that the steam pressure in the chamber 28 acts t-o balance the valve and thus not only reduce friction to the minimum but insure operation under minimum pressure for a long period of service.

In actual practice the steam enters through port 12 and opening` 17 of the bushing and passes from chamber 28 of the valve through the communicating port 4f to the cylinder and forces the piston 9 toward the opposite end or head of the cylinder. In traveling in the direction indicated the piston forces the exhaust steam from the cylinder thro-ugh the other port 4 and communicating exhaust chamber 29 into chamber 5 from which it escapes through the exhaust port 6. When the piston movement in the direction indicated ceases, the position of the valve is reversed and the exhaust chamber 29 establishes communication between the other port 4 and chamber 5 and opens communication between chamber 28 and the opposite end of the cylinder to admit steam. to such end to eect reverse action of the piston. As the piston or the wear strips are reduced in thickness fro-m frictional contact, the springs 36 by upward pressure on such strips maintains the steam-tight relation of the latter with the valve.

Should it be desired to disconnect one side of the engine, the valve at that side may be inverted so that the po-rt 17 of the bushing shall be blanked or covered and thus prevent steam entering the steam chest.

From the above description it will be apparent that I have produced an oscillating valve embodying the features enumerated as desirable and I wish it to be understood that y I do not desire to be restricted to the exact details of construction shown and described as obvious modifications will suggest themselves to oney skilled in the art.

I claim:

1. The combination with a cylinder and a cylindrical steam chest having ports conf necting opposite ends of the former with the latter at opposite sides of its center and an exhaust port between the first-named ports connecting the steam chest with the atmostransverse grooves, and springs underlying said frames and tending to press them upwardly out of said grooves.

2. The combination with a cylinder and a cylindrical steam chest having ports connecting opposite ends of the former with the latter at opposite sides of its center and an exhaust port between the first-named ports connecting the steam chest with the atmosphere and having longitudinal grooves between t-he said port-s and o-utward of the irst-named ports and transverse grooves connecting the ends of the longitudinal grooves, of a packing frame fitting in the grooves surrounding each of the first-named ports, said packing frames having inwardly projecting lapping extensions at their ends occupying the cent-ral portions of said transverse grooves, springs underlying said frames and tending to press them upwardly out of said grooves, and an oscillatory valve fitting in the steam chest and provided with a supp-ly chamber and an exhaust chamber, and an inlet opening thro-ugh which steam passes into the supply chamber, said valve being engaged peripherally by the spring actuated packing frames. y Y

In testimony whereof I affix my signature,

in the presence of two witnesses.

' GEORGE A. RUSH.

Witnesses:

HELEN C. RoDGERs, E. Y. THORPE. v

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

